Device for preheating the explosive mixture in explosion engines



G.- W. McILRATH AND 1. E. TAYLOR.

DEVICE FOR PREIIEATIIIG THE EXPLOSIVE MIXTURE IN EXPLOSION ENGINES.APrucAnou HlED mm. I. 1920.

1,41 5, 1 84. Patented y 1922.

lf T' NT orrice.

DEVICE FOR PREHEATING THE EXILOSIY E MIXTURE IN EXPL OSION ENGINEQwaist.

snenifinafinn of Letters Patent.

rammed may '9. 1922.

Application filed March 1. mzu. serial no. 36255115 T 0 all whom it mayconcern Be it known that we, Gnome lilo- ILRA'IH and JAGK E. TAYL OR,citizens of the United States, and residents of C'leveland. in thecounty of Cuyahoga and State of Ohio, have invented certain new anduseful Improvements in Devices for Preheating vide an improved thermaldevice for rarefying and preheating the explosive mixture composed ofcommingled gas and air as it. enters the intake or manifold of anexplosion engine, and after passing through the carburetor, and alsoadapted to place the vapors in condition for instant ignition, by raising their temperature to a point just belowe that of ignition. By thismeans. in cold weather, the commingled gas and air will never fail to beignited by the spark and the efliciency of the engine will be greatlyaugumented.

The invention comprises the einployn'ient of a multiple number ofpassages through which the commingled and air must pass to the cylindersthrough the inlet passages or manifold. and includes electricallyoperated means for heating these passages, the heat being transmittedfrom the walls of the aforesaid passages to the gases passing throughthem.

The invention includes a device, comprising a closure or head, which canbe ttached to the flanges of the aforesaid. manifold and carburetor insuch a manner as to cxcliule air and a multiple number of metallic tubespassing therethrough. which form pas ages for the commingled air and gasentering the manifold. It includes electrically heated coils, encirclingthe aforesaid tubes and suit ably insulated therefrom. and insulatingmeans separating the said closure. and tubes from the walls of saidci'irburclor and inanifold.

The invention is illustrated in the arr-om panying drawings. hereinaftermore fully described and specifically pointril out in the claims. In theaccompanying drawings Fig. l is a vertical central sc -lion of theflanged extremities of the carburetor lllillll fold, showing thepreheating clement en- .nals iiiari h severaltubularpassages.v Y

1.1; also-shows the heatiugicoiis and termile' tric current; ig: :2 i aplan of the preheater removed from the engine; Fig. 8 is a sideelevation thereof and Fig. 4 1s detail of three of the coils.

In these views A represents a metal plate, which is pressed into cupshape and closes the entrance to the manifold B; I is a botton plate,which with the cup shaped plate forms an enclosure through which passthe short metal tubes C, C.

The cup shaped plate closes the entrance to the manifold B, leading tothe engine evlinders, and the tubes C, C, form the only means ofcommunication between the carbureter D, and the manifold, and theexplosive mixture must pass through them.

Encirclin these tubes. are shown the heating coils E, t mounted upon theinsulating spools F. F, and the coils are connected in series in theelectric circuit G, passing through terminals H, H.

The source of electricity may comprise a battery, a dynamo or otherconvenient generator, and an insulation is shown at J, J, preferablyformedol asbestos sheets. which form an air tight gasket. Between thesesheets the electric wires pass. Also the terminals are insulated toprevent the escape of the electric current to the engine casing orcylinders. Or if desired, one end of the circuit may be grounded in theengine cylinders.

The voltage of the electric current and the diameter of the wire in thecoils will determine the degree of temperature produced in the metaltubes. which should be sufficientli high to raise the temperature in theexplosive mixture to nearly the ignition point, so that the action ofthe spark will never fail to produce instant ignition.

Having described the invention what we claim as new and desire to secureby Letters Patent is i l. The combination with the carburetor and intakepassage of an explosion engine of a closure for said passage. saidclosure forming a hollow body formed .in two portions, hollow metallictubes connecting the ends of said closure. resistance coils encirclingsaid tubes, insulating means between said portions of said closure, saidcoils passing between said insulating means.

2. The combination with the carburetor and intake passage of anexplosion engine, oi a closure for said passage, said closure form ing ahollow body formed in CWOPOLtlOHS, hollow metallic tubes connecting theends of said closure, resistance coils encircling. said tubes,insulating means betwen said portions of said closure, said coilspassing between said insulating means and insulated terminals for saidcoils.

3. In a device for the purpose set forth, a closure, metallic tubespassing through the opposite ends of said closure, insulated 4 wirespassing around said tubes, said closi-i re-forn ed n two portionasheetsof insula- 15 'tlon" secured between said portions, said in- ;sulatedrwi respassing between saidsheets,

and terminals for said Wires In testimony whereof. We hereunto set ourhands this 7 day of February, 1920. GEQRGE W. MCILRATH. JACK E. TAYLOR.

WM. M. MoNRoa'.

